Is there a pin-compatible replacement for ETA1654FSG?

No pin-to-pin compatible replacement for the ETA1654FSG has been identified. All potential alternatives require pinout verification and likely changes to the PCB layout and external components.

What risks should I check before replacing ETA1654FSG?

Key risks include lower output current, different input voltage ranges, and changes in control topology which affect stability. Always verify the pinout, switching frequency, and required external components from the new part's datasheet.

ETA1654FSG Alternatives, Datasheet & Cross Reference | ETA

ETA1654FSG is a high-efficiency 18V, 4A synchronous step-down converter in a SOT563 package. While no direct drop-in replacements are available, functional alternatives exist but require design modifications.

AI replacement insight

Electrical riskhigh

Candidates have lower output current and different control loops.

Package riskmedium

Same package name, but pinout is unverified and likely different.

Sourcing risklow

TI alternatives are generally well-distributed.

Can it be replaced directly?

No direct, drop-in replacement for ETA1654FSG is currently known. All substitutes require electrical and layout review.

Best replacement path

Review application current needs to see if a 3A part like TPS563202DRLR is sufficient, followed by a board redesign.

Main risk

Electrical downgrade and potential pinout incompatibility.

Recommended alternatives

A functional alternative with similar frequency but lower 3A output current, requiring design review.

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Alternative comparison matrix

Feature / factor	ETA1654FSG	TPS563202DRLR	TPS562231DRLR	Compatibility / risk
Package	SOT563	SOT563	SOT563	SOT563 — Package name matches.; TPS562231DRLR: Package name matches.
Pinout	Unknown	Unknown	Unknown	Unknown — Pinout must be verified from datasheet.; TPS562231DRLR: Pinout must be verified from datasheet.
Voltage	4.5V to 18V	4.3V to 17V	4.5V to 17V	4.3V to 17V / 4.5V to 17V — Slightly narrower input voltage range.; TPS562231DRLR: Slightly narrower input voltage range.
Current	4A	3A	2A	3A / 2A — Downgrade in output current.; TPS562231DRLR: Significant downgrade in output current.
Frequency	600kHz	580kHz	-	580kHz — Switching frequency is very close.
Interface	Adaptive COT	-	D-CAP3	D-CAP3 — Different control scheme affects stability and transient response.

Application & sourcing insights

Questions & answers

Currently, there is no single 'best' alternative. Parts like the TPS563202DRLR offer similar functionality but with a lower 3A output current. The best choice depends on your specific application's current requirements.